Hello,
syzbot found the following issue on:
HEAD commit: a5df3a702b2c Linux 6.6.96
git tree: linux-6.6.y
console output:
https://syzkaller.appspot.com/x/log.txt?x=16b4cbd4580000
kernel config:
https://syzkaller.appspot.com/x/.config?x=2632deddafa957e8
dashboard link:
https://syzkaller.appspot.com/bug?extid=435ebc74366bec560db2
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image:
https://storage.googleapis.com/syzbot-assets/9ba5b19f9f4d/disk-a5df3a70.raw.xz
vmlinux:
https://storage.googleapis.com/syzbot-assets/2cd779015729/vmlinux-a5df3a70.xz
kernel image:
https://storage.googleapis.com/syzbot-assets/b56fc39e5cb8/bzImage-a5df3a70.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by:
syzbot+435ebc...@syzkaller.appspotmail.com
------------[ cut here ]------------
kernel BUG at fs/ocfs2/alloc.c:6012!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 15421 Comm: syz.5.2200 Not tainted 6.6.96-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__ocfs2_flush_truncate_log+0xf7e/0x10b0 fs/ocfs2/alloc.c:6012
Code: ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 28 fc ff ff 48 89 df e8 e3 d9 93 fe e9 1b fc ff ff e8 79 2a 3b fe 0f 0b e8 72 2a 3b fe <0f> 0b f3 0f 1e fa 65 44 8b 35 10 4e b9 7c bf 07 00 00 00 44 89 f6
RSP: 0018:ffffc90004acfb20 EFLAGS: 00010283
RAX: ffffffff834a6bee RBX: ffff88807e4cc000 RCX: 0000000000080000
RDX: ffffc9000d9ee000 RSI: 000000000000f044 RDI: 000000000000f045
RBP: ffffc90004acfd38 R08: ffffc90004acfaa7 R09: 1ffff92000959f54
R10: dffffc0000000000 R11: fffff52000959f55 R12: 00000000ffffffff
R13: ffff88805ed86c38 R14: ffff888058851a00 R15: ffff888028e66000
FS: 00007f37d48c66c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33c0dff8 CR3: 000000002f539000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
ocfs2_flush_truncate_log+0x4f/0x60 fs/ocfs2/alloc.c:6077
ocfs2_sync_fs+0x117/0x310 fs/ocfs2/super.c:402
iterate_supers+0xb2/0x170 fs/super.c:979
ksys_sync+0xb3/0x150 fs/sync.c:104
__ia32_sys_sync+0xe/0x20 fs/sync.c:113
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f37d398e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f37d48c6038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f37d3bb6080 RCX: 00007f37d398e929
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f37d3bb6080 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f37d3bb6080 R15: 00007ffd8ab62b08
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__ocfs2_flush_truncate_log+0xf7e/0x10b0 fs/ocfs2/alloc.c:6012
Code: ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 28 fc ff ff 48 89 df e8 e3 d9 93 fe e9 1b fc ff ff e8 79 2a 3b fe 0f 0b e8 72 2a 3b fe <0f> 0b f3 0f 1e fa 65 44 8b 35 10 4e b9 7c bf 07 00 00 00 44 89 f6
RSP: 0018:ffffc90004acfb20 EFLAGS: 00010283
RAX: ffffffff834a6bee RBX: ffff88807e4cc000 RCX: 0000000000080000
RDX: ffffc9000d9ee000 RSI: 000000000000f044 RDI: 000000000000f045
RBP: ffffc90004acfd38 R08: ffffc90004acfaa7 R09: 1ffff92000959f54
R10: dffffc0000000000 R11: fffff52000959f55 R12: 00000000ffffffff
R13: ffff88805ed86c38 R14: ffff888058851a00 R15: ffff888028e66000
FS: 00007f37d48c66c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c797356950 CR3: 000000002f539000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
---
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